component
LM49450SQ
Public Made by Adomby adom
Texas Instruments Audio Amplifiers, QFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM49450SQ
Texas Instruments · Audio Amplifiers · QFN-32-EP(5x5)
LM49450SQ from Texas Instruments, in a QFN-32-EP(5x5). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | C1P | passive | Charge pump flying capacitor positive terminal for external capacitor connection. |
| 2 | CPGND | power_in | Charge pump ground reference. |
| 3 | SDA | input | I2C serial data input for device control interface. |
| 4 | DGND | power_in | Digital ground reference. |
| 5 | I2S_WS | input | I2S word select input for stereo audio interface. |
| 6 | I2S_SDI | input | I2S serial data input for 24-bit digital audio data. |
| 7 | I2S_CLK | input | I2S clock input for audio data synchronization. |
| 8 | MCLK | input | Master clock input for DAC and digital processing. |
| 9 | SCL | input | I2C clock input for device control interface. |
| 10 | DVDD | power_in | Digital core power supply, 2.7V to 4.5V. |
| 11 | IOVDD | power_in | Digital interface power supply, 1.8V to 4.5V. |
| 12 | GND | power_in | Analog ground reference. |
| 13 | REF | output | DAC reference bypass output, requires external bypass capacitor to ground. |
| 14 | INR | input | Right channel analog line input. |
| 15 | INL | input | Left channel analog line input. |
| 16 | VDD | power_in | Analog power supply, 2.7V to 5.5V. |
| 17 | BYPASS | output | Mid-rail bias bypass output, requires external bypass capacitor to ground. |
| 18 | LSVDD | power_in | Speaker amplifier power supply, 2.7V to 5.5V. |
| 19 | LLS+ | output | Left channel non-inverting speaker amplifier output. |
| 20 | LLS- | output | Left channel inverting speaker amplifier output. |
| 21 | LSGND | power_in | Speaker amplifier ground reference. |
| 22 | RLS- | output | Right channel inverting speaker amplifier output. |
| 23 | RLS+ | output | Right channel non-inverting speaker amplifier output. |
| 24 | LSVDD | power_in | Speaker amplifier power supply, 2.7V to 5.5V. |
| 25 | HPGND | power_in | Headphone amplifier ground reference. |
| 26 | HPS | input | Headphone sense input for automatic headphone detection. |
| 27 | HPR | output | Right channel headphone amplifier output, ground-referenced. |
| 28 | HPVDD | power_in | Headphone amplifier power supply, 1.8V to 2.7V. |
| 29 | HPL | output | Left channel headphone amplifier output, ground-referenced. |
| 30 | HPVSS | power_out | Charge pump negative voltage output providing headphone amplifier negative power supply. |
| 31 | C1N | passive | Charge pump flying capacitor negative terminal for external capacitor connection. |
| 32 | CPVDD | power_in | Charge pump power supply, 2.7V to 5.5V. |
| 33 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | QFN-32-EP(5x5) |
| Category | Amplifiers/Comparators |
| Pins | 33 |
CAD (KiCad official)
- Symbol:
LM49450SQ - Footprint:
Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm - 3D model: QFN-32-EP(5x5) (KiCad packages3D, STEP)
- 3D model files:
lm49450sq-etched.step/lm49450sq-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm49450sq.step/lm49450sq.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (44 pp, sha256
be2deddb634a1b75, retrieved 2026-10-01, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).